Synthesis, Structures, and Magnetism of Four One-Dimensional Complexes Using [Ni(CN)(4)](2−) and Macrocyclic Metal Complexes

Four one-dimensional complexes, denoted as [NiL(1)][Ni(CN)(4)] (1), [CuL(1)][Ni(CN)(4)] (2), [NiL(2)][Ni(CN)(4)]·2H(2)O (3), and [CuL(2)][Ni(CN)(4)]·2H(2)O (4) (L(1) = 1,8-dimethyl-1,3,6,8,10,13-hexaaza-cyclotetradecane; L(2) = 1,8-dipropyl-1,3,6,8,10,13-hexaazacyclotetradecane) were synthesized by reacting nickel/copper macrocyclic complexes with K(2)[Ni(CN)(4)]. Subsequently, the synthesized complexes were characterized using elemental analysis, infrared spectroscopy analysis, thermogravimetric analysis, and X-ray powder diffraction. Single-crystal structure analysis revealed that the Ni(II)/Cu(II) atoms were coordinated by two nitrogen atoms from [Ni(CN)(4)](2−) with four nitrogen atoms from a macrocyclic ligand, forming a six-coordinated octahedral coordination geometry. Nickel/copper macrocyclic complexes were bridged by [Ni(CN)(4)](2−) to construct one-dimensional chain structures in 1–4. The characterization results showed that the four complexes obeyed the Curie–Weiss law with a weak antiferromagnetic exchange coupling.